| 41. | The accelerometer was mounted on a concrete platform on a granite ridge just above one of the arch dam's abutments.
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| 42. | The concrete thin-arch dam was completed in 1960 by the United States Bureau of Reclamation as a water storage project.
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| 43. | In 2003, the 1836 arch dam was bypassed to meet water quality standards set by the Ohio Environmental Protection Agency.
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| 44. | The most desirable place for an arch dam is a narrow canyon with steep side walls composed of sound rock.
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| 45. | The Tekeze Hydro Electric project constructed the highest double curve arch dam in Africa, topping the previous highest, in Lesotho.
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| 46. | Pensacola Dam, completed in the state of Oklahoma in 1940, was considered the longest multiple arch dam in the world.
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| 47. | At the time, the 371 foot ( 113m ) high dam was the tallest arch dam in the U . S.
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| 48. | Kulamavu Dam was constructed to prevent the water escape through a rivulet called Kalivally, 30 km west to Idukki Arch Dam.
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| 49. | The Idukki Dam is a double curvature arch dam constructed across Periyar River in a narrow gorge between two granite hills.
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| 50. | The construction of the arch dam was undertaken after extensive explorations of the geological features confirmed the suitability of the site.
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